4,4′-Diamino-2,2′-stilbenedisulfonic acid CAS 81-11-8
4,4 '- diaminodiphenyl-2,2' - disulfonic acid belongs to the class of stilbene compounds and can be prepared by hydrogenation of its nitro substituted precursor compounds. 4,4 '- Diamino-2,2' - stilbenedisilfonic acid is a yellow needle shaped hygroscopic crystal. Very slightly soluble in water, soluble in ethanol and ether, easily soluble in alkaline solutions.
| Item | Specification |
| pKa | -1.58±0.50(Predicted) |
| Melting point | 300 °C |
| Density | 1.4732 (rough estimate) |
| Vapor pressure | 1.3hPa at 25℃ |
| SOLUBLE | <0.1 g/100 mL at 23 ºC |
| Refractivity | 1.6510 (estimate) |
4,4 '- Diamino-2,2' - stilbenedisilfonic acid dye and intermediate such as fluorescent whitening agent. 4,4 '- Diamino-2,2' - stilbenedisilfonic acid is used to produce fluorescent whitening agent, direct frozen yellow G and direct yellow R, and as insecticide
Usually packed in 25kg/drum,and also can be do customized package.
4,4'-Diamino-2,2'-stilbenedisulfonic acid CAS 81-11-8
4,4'-Diamino-2,2'-stilbenedisulfonic acid CAS 81-11-8
